Table 2.
Peri- & Post-Operative Demographics and Clinical Characteristics
| Unsuspected N2 (N=2,047) | Suspected N2 (N=2,302) | p-value | |
|---|---|---|---|
| Re-admission in 30 days, n (%) | <0.01 | ||
| Yes | 60 (2.9%) | 75 (3.3%) | |
| Unknown | 1,062 (51.9%) | 984 (42.8%) | |
| Regional Lymph Nodes (LN) Examined | |||
| No. of patients with LN examined | 2,032 (99.2%) | 2,112 (91.7%) | |
| Median (IQR) | 11 (6,19) | 8 (3,19) | <0.01 |
| Positive Lymph Nodes (LN) Examined | <0.01 | ||
| No. of patients with LN Examined | 2,033 (99.2%) | 2,100 (91.2%) | |
| Median (IQR) | 3 (1,5) | 2 (0,9) | |
| Surgical Inpatient Stay, Days from Surgery | <0.01 | ||
| No. of patients with available data | 924 | 1,176 | |
| Mean (SD) | 7.9 (9.0) | 7.4 (8.2) | |
| Tumor Location, n (%) | <0.01 | ||
| RLL | 406 (19.8%) | 331 (14.4%) | |
| LLL | 263 (12.9%) | 177 (7.7%) | |
| RML | 81 (4.0%) | 83 (3.6%) | |
| RUL | 586 (28.6%) | 1,087 (47.2%) | |
| LUL | 638 (31.2%) | 536 (23.3%) | |
| Other | 73 (3.6%) | 88 (3.8%) | |
| Surgical Margins, n (%) | <0.01 | ||
| No Residual Tumor | 1,785 (87.2%) | 1,971 (85.6%) | |
| Microscopic Residual Tumor | 116 (5.7%) | 91 (4.0%) | |
| Macroscopic Residual Tumor | 55 (2.7%) | 82 (3.6%) | |
| Unknown | 91 (4.5%) | 158 (6.9%) | |
| Pathologic T stage | <0.01 | ||
| T0 | 1 (0.1%) | 95 (4.1%) | |
| T1 | 693 (33.9%) | 596 (25.9%) | |
| T2 | 1,122 (54.8%) | 577 (25.1%) | |
| T3 | 122 (6.0%) | 108 (4.7%) | |
| T4 | 106 (5.2%) | 61 (2.7%) | |
| IS | 0 (0.0%) | 3 (0.1%) | |
| Unknown | 3 (0.2%) | 862 (37.5%) | |
| Pathologic N Stage | <0.01 | ||
| N0 | 0 (0.0%) | 630 (42.1%) | |
| N1 | 0 (0.0%) | 144 (9.6%) | |
| N2 | 2,047 (100.0%) | 718 (47.9%) | |
| N3 | 0 (0.0%) | 6 (0.4%) | |
| Pathologic M Stage | <0.01 | ||
| M1 | 0 (0.0%) | 16 (0.7%) | |
| Thirty Day Mortality | 50 (2.5%) | 56 (2.4%) | 0.97 |
* P values provided are from Wilcoxon Rank Sum test on continuous variables and from Chi-square test on categorical variables.